Type-writing machine.



PATENTED AUG. 25, 1908.

W. E. BARNARD. TYPE WRITING MACHINE. APPLIOATION FILED JULY 15. 1907.

, WZLlterZBarnard. $7112 fiornqg.

UNITED STATES PATENT OFFICE.

WALTER E. BARNARD, OF HARTFORD, CONNECTICUT, -ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

I TYPE-WRITING MACHINE.-

Application filed July 15, 1907.

To all whom it may concern:

Be it known that I, WALTER E. BARNARD, a citizen of the United States, residing in Hartford, in the county of Hartford and :State ofConnecticut have invented certain new and useful Improvements in Type- VVriting Machines, of which the following is a specification.

This invention relates to the paper-controlling devices of typewriting machines, and especially to those in which the paper is fed around a cylindrical platen, and more particularly to those in which types strike upon the front side of the laten.

One of the main 0 jects of my invention is to make it more convenient to make erasures or corrections in machines in which the types strike upon the front side of the platen. In such machines the line of Writing on the aper is awkward to reach with an erasing implement, especially in machines in which the carriage frame lies in front of the platen. To overcome this objection, I' contrive to give the platen, whenever desired, an advance movement of a quarter of a revolution or a little less to bring the line of writing to the top of the platen where said line is not only accessible, .but also in convenient osition for the use of the eraser. Upon ma ing the erasure the platen is rotated back and mechanically arrested in its initial position, so that the writing may proceed. This movement of the'platen, I effect by means of a lever or'crank which is normally stationary duringthe rotation of the laten, but

is conneotible at any time to the p aten to rotate the same forwardly until the crank and platen are arrested by a stop in such a position that the line of writing is at or near the top of the platen. Then the lever is used to turn 'the platen backwardly until it is restored to its initial position. tion of'the crank with the'platen is maintained mechanically during both the advance and return movements of the crank. Upon reaching initial position, however, a

spring disconnects the crank from the platen,

and moves said crank into engagement with the detent., I also make use of the same crank to turn the platen backwardly from normal position through a fraction of an ordinary line-space, for convenience in writing exponents, accents, fractions, etc.; a stop serving to limit such backward movement of the lever from normal position, and said- Specification of Letters Patent.

.tion of the cran r.

The connec-f Patented Aug. 25, 1908.

Serial No. 383,880.

spring action serving to disconnect the crank from the platen and rengage it with.-

ing my improvements applied thereto; the

platen rotating-crank being shown in its normal positions of disuse. Fig. 2 is a similar view partly in longitudinal section, and showing the crank connected to the platen to rotate the latter. Fig. 3 is a face elevation of the crank, and illustrates the method of swiveling the same upon a.collar which is loosely mounted upon a hub of a hand wheel. Fig. 4 is a perspective view of a crank and its connected parts. Fig. 5 is a sectional elevation looking towards the left at Fig. 1, but showing the crank as having. been advanced to bring the line of writing to the top side of the platen. Fig. 6 is a view similar to Fig. '5, but showing the crank as having been retracted from normal position to permit the writing of exponents, etc. Fig, 7 is a view similar to Fig. 5, but showing the crank in normal osition. Fig. 8 is an eleva- Fig. 9 is a detail of the collar upon which the crank is swiveled .and of the spring which restores the crank. Fig. 10 is a view looking towards the right at Fig. 1 and showing the end of the platen frame,

and also the platen and the type-bar.

Types 1 strike against the front side of a platen 2, which is journaled by means of an axle 3 in a platen frame of the usual constrnction and comprising ends, such as 4.

' Fixed upon the platen axle is a notched linespace wheel 5, with which cooperates a detent 6 pressed into the notches of the wheel by a spring 7.' The platen is advanced line by line by the usual reciprocatory linespacing mechanism comprising a pawl 8 mounted. upon a slide 9 and operated by a lever.

A handwheel 10' is secured by means ofa platen axle 3. Outside of the platen frame to the inner end of said hand wheel iss'ecured a disk or-wheel 13l1aving perforations, openings or notches. 14 at line-space intervals, there being as many ofsaid perforations as there. ar teeth in the line space wheel 5. A projec ing pin or tooth 15 is adapted to enter any of said, openings 14; said pin hub 11 and screw 12 upon the endof the I being fixed upon the outer side of a crank 16 which is swivelcd by means of prongs 17 upon a.collar 18 which is mounted loosely upon the hub 11, so that the platen axle may turn independently of the crank in the usual line-spaeing operation. The prongs 17 are mounted looselyin a transverse recess 19 in said collar below the main opening, to permit the crank to have a limited swiveling action longitudinally of the platen from the Fig. 1 to the Fig. 2 position. A collar 20 is fixed by a screw 21 upon the inner end of the hub 11 to confine the loose cob lar 18 against the face of the wheel 13, thereby retaining the prongs 17 in-the socket 19. Uponthe inner face of the crank is fixed a pinor stop 22 which normally projects through a perforation. 23 formed in a v0- tical plate 24, which depends from the outer side of the platen frame, and is fixed thereon. by a flange 25 and screws 26.

When it is desired to make a correction, the crank 16 is swung to the left fromthe Fig. 1 to the Fig. 2 position, thereby causing the pin 15 to enter and interlock with one of the holes 14in the wheel 13 which is fixedly connected to the platen, and turns about the platen axis. This movement of'the crank withdraws the projection or stop 22 from the perforation 23, so that the crank is permitted to. rotate about the axis of the Wheel 13. The crank is then'pushed rearwardly to turn the platen forwardly, through a quarter of a revolution or a little less, until. the projection 2Q engages a stop 27 projecting outwardly from the plate 24, thereby arresting the crank together with the platen soon as the brought to the top side of the platen. The plate z t-serves as a guard to maintain the lever iii" the Fig.2 position, that is, in interlocking engagement with the wheel 13. The erasure is then made, and the hand wheel 11 is turned to rotate the platen backwanlly until the projection 22 opening in the guard plate, whereby a spring 28 swings the crankfrom the Fig. 2 to the Fig. 1 position withdrawing the projection 15 from the wheel 13- and snapping the projection 22 into the opening 23, the latter serving as a detent to hold the crank against revolution about the platen axis. The spring 28 is secured by a screw .29 to the vcollar 18, and its upper end engages with a notch formed in the lower edge of a bloclcjil) fixed upon the face of the lever a iii l ij'n'i iiigf, as a base for the pin 22. lnsteai ljif using the hand wheel 10 to restore'tl ilaten :to normal positiomthc crank 16 n, bc e im ployed, the operator gently pressing the same to the right as he rotates the platen backwarclly, whereby the pressure of the operators finger insures the pin 22 entering the notch 23.so thatthc forward edge of the latter may serve as a stop, to limit the reline of writing is comes opposite the i than the movement of limiting i se /324s turn movement of the crank and connected platen. 1 also provide upon the guard plate 24 a front-stop 31 close to the opening 23, and usable when writing exponents,

fractions, etc. in this is swung to the left as before to engage it with the wheel 13, and then the crank is pulled forwardly until the pinor stop 22 engages the stop 31 as seen at Fi s, thus retracting the platen to a fraction of a linespace and enabling iigures or letters to be written a little above the line of writing. 'Phe platen may be returned to normal position by means of the crank 16 or by means of the spring 7 acting through the. detent 6 to return the line space wheel 5 to normal position; and the spring 28 restores the crank to the normal position of Fig. 1. stop 31 may however, be omitted in some cases. 1

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim: h.

1. In a typewriting machine, the combination with a revoluble platen, a platen frame, and a reci rocatory line-spacing mechanism, of a whee connected to the platen and having notches or openings at vals, a crank mounted for revolution about the axis of said wheel, said crank being also movable in a direction longitudinal of said wheel axis to engage said notches or open-' ings, moans mechanically maintaining such engagement during the rotation of the platen to and fro by said crank through an are greater than the movement of the platen effcctible by said line-spacing mechanism, and stops for limiting the backward and forward throws of said crank and platen.

2. lna typewriting machine, the combination with a revoluble platen, a platen frame, and a reciprocatory line-spacing mechanism. of a wheel connected to the platen and having notches or openings at l iie space intervals, a crank mounted for revolution about the axis of said wheel but normally disconnected from the wheel, a detent normally engaging said crank, said crank being also movable in a direct ion longitudinal of said wheel axis both to become released from said detent and to engage said notches or openings, means meehanii'sally maintaining such ongagement during the rotation of the and fro by said crank through an are greater the platen efl'eetible l line-spacing mechanism, stops for the backward and forward throws of said crank and laten, and a spring to disenagcthe crankfrom said notched wheel.

operation, the crank platen, a platen frame and a rceiproeatory line-spacing mechanism, l of a crank mounted for revolution but norline-spacc inter platen to The 3. -l n a typewriting machine, the combination, wit h a, re voluble mall crank being also movable in a direction longitudinal of the axis of such revolution, means connecting said crank to said platen at said movement of the crank, and means mechanically maintaining such connection during the rotation of the platen to and fro by said crank through an are greatly in excess of the movement of the platen effectible by said line-s acing mechanism.

4. n a typewriting machine, the combination with a revoluble platen and a platen frame, of a crank mounted for revolution but normally disconnected from the platen, said crank being also movable in a direction longitudinal of the axis of such revolution, means connecting said crank to said platen at said movement of the crank, meansmechanically maintaining such connection during the rotation of .the platen to and fro by said crank, and a spring to effect disconnection of the crank from the platen upon their return to starting position.

5. In a typewriting machine, the combination with a revoluble platen, and a platen frame, of a Wheel connected to the platen and having notches or openings at line-space intervals, a crank mounted for revolution about the wheel axis, a detent to hold. said crank stationary during the usualfrotation of the platen, said crank being mounted for a movement longitudinally of the platen to become released from said detent, and having means to engage said notched wheel at said releasing movement, a sto for limiting the forward rotation of the p aten effected by said crank as soon as the line ofwriting is brought from the-printing point to the top of the platen, and a spring to effect disconnection of the crank from the platen upon their return to starting position.

6. In a typewriting machine, the combination with a revoluble platen and a platen frame, of a wheel connected to the platen and having openings or notches at line-space in tervals, a guard plate upon the platen frame parallel with said wheel, a crank 'revoluble about said wheel axis andalso swiveled to vibrate longitudinally of said-wheel axis, a projection upon said crank, a spring 'nor mally pressing said projection into an opening in said guard plate, a tooth upon said crank to engage said notched wheel when the crank is Withdrawn from the opening insaid guard plate, and a stop for limiting the throw of the platen effected'by said-crank; said guard plate effective to maintain the engagement of said crank with said Wheel during the excursion ofthe crank from and back to its starting point.

7. In a typ'ewriting machine, the combination with a revoluble platen and"a'.platen frame, of a wheel connected to theplaten and having openings or notchesat line-space in-; 66 tervals,.-k g'r l ai 'd plate upon the platen frame disconnected from the platen, said parallel with said wheel, a crank revoluble about said wheel axis and also swiveled to Vibrate longitudinally of said wheel axis, a projection upon said crank, a spring normally pressing said projection into an opening in said guard plate, a tooth upon said crank to engage said notched wheel when the crank is .withdrawn from the opening in said guard plate, and a stop for limiting the throw of the laten effected. by said crank; said guard p ate effective to maintain the engagement of said crank with said wheel during the excursion of the crank from and back to its starting point; said crank being mounted between said wheel and said guard plate, and the latter having a stop to limit the throw 0 the crank. g

8. In a typewriting machine, the combination with a revoluble platen, an axle therefor, a finger wheel fixed thereto, and a platen frame, of a wheel fixed to the finger Wheeloutside of the platen frame and having openings or notches at line space intervals, a guard plate being provided upon the platen frame parallel with said wheel, a collar loose upon the platen axle, a crank-between said plate and wheel and swiveled upon said collar to vibrate longitudinally of the platen axis, a projection upon one side of said crank, a spring normally pressing said projection into an opening in said guard plate, a tooth upon the opposite side of said crank to engage, said notched wheel when the lever is withdrawn from the opening insaid guard plate, and a stop for limiting the throw of the platen effected by said crank said guard plate effectiveto maintain the engagement ofsaid crank with said wheel during the excursion of the crank away from and back to its starting point.

9. In a typewriting machine, the combination with a revoluble platen and a platen frame, of a wheel connected to the platen and provided with notches or openings at linespace intervals, a collar loosely'mounted on the axis of said wheel, a crank swiveled uponwith the'wheel, and a stop to-limit the throw of the laten effected by said crank.

10. n a typewriting machine, the combination with a revoluble platen, a platen frame, and a reciprocatory line space mechanism including a toothed line-space wheel and a detent therefor, of an index wheel connected to said platen, an index normally disconnected from said index wheel, but movable into engagement therewith,'to rotate with the platen from its initialbposition' through an are greater thanthemovement of the platen ,efi'ectible by said line-space mechanism, a stop to arrest such movement of the mdex and platen, means to maintain the engagement of the index and index 7 to less than a sin le line-space Wheel during the back and forth rotations of the platen, a stop to arrest the index and platen upon return to'initial position, and a stop to limit to less than a single line space the rotation of said index together with said platen in the'opposite direction. from the starting point.

11. In a typewriting'machine, the combination with a revoluble platen, a platen frame, and a reciprocatory line-spacemechanism including a toothed line-space wheel and a detent therefor, of an index wheel connected to said platen, an index normally disconnected from said indexwheel, but movable into engagement therewith, to rotate with the platen from its initial position through an arc reater than the movement of the platen e mechanism, a stop to arrest such movement of the index and platen, means to maintain the engagement of the index and index wheelv during the back and forth rotations of the platen, a stop toarrest the index and platen upon return to initial position, a stop to limit the rotation of said index toget er with said platen in the opposite direction from the starting point, and a sprin 'to disconnect the index from the index w I position, stops to arrest the forward and rewturn movementsof the platen and crank, and

,a stop'to limit the movement of the platen "backward from'initial position to less than a nc space. i I

13;. In a typewriting machine, the combination with a' r'evoluble platen, a platen frame, and a line-space mechanism including a line-space'wheel and a detent therefor, of a wheel having openings at line-space intervals and connected to the. platen, a crank mounted for revolution about the platen axis,

means for connecting the crank to the last mentioned. wheelto rotatet-he platen either forwardly from initial position to bring the lineof writing from the printing point to the ,up er side of the platen, or backwardly for a istance-l'ess-than a line-space from initial ectible' by said line-space "frame, and a reciprocatory line- 'eel u pon' the completion of the return movement of the platen in either direc y from normal position,

lat-en position-stops to arrest the forward and return movements of the platen and crank, a sto to limit the movement of the platen bac Ward from initial position to less than a line space, and a spr ng to disconnect the crank from the platen upon the'return of the platen in either direction to starting position.

'14. In a typewriting machine, the combination with a revoluble laten, a latcn frame, and a line-space mec anism including aline-space wheel and a detent therefor, of a wheel having openings at line-space intervals and connected tothe platen, a crank mounted for revolution about the platen axis, means for connecting the crank to the last mentioned wheel to rotate the platen forwardly from initial position to bring theline of Writing from the printing point to the upper side of the platen, sto s to arrest the movements of the platen anr crank, one stop limiting the movement to less than a line space, a spring to disconnect the crank from the platen upon the return of the platen to starting position, and a detent normally holding thecrank against movement.

15. nation with a revoluble platen, a platen spacing mechanism, t a crank mounted for revolution about the platen axis, a detent normally holding said crank stationary during the :rotation of the platen, said crank being rotatable either forwardly or backwardly a spring normally holding said crank in engagement with said detent, said crank being mounted for a re- 2 leasing'movement from said detent, a wheel connected to the platen and having notches or openings at line -spaoe intervals, said notches engageable by said crank at its releasing movement, and said crank capable of turning said platen through an arcmuch greater'than the movement of the'platen efiectible by said line-spacing mechanism, a stop to limit the rotation of the connected crank and platen from .normal position through said are, and a stop to limit the throw of the crank and site direction from normal position.

16. In a typewriting machine, the combi- .nation with a revoluble platen, a platen frame, and a reciprocatory line spacing mechanism, of a wheel connecte( to the In a typewriting machine, the combiplaten in the oppop:

platen and having notches or openings at line-space intervals, a crank mounted. for

revolution about the axis of said. wheel but normally disconnected from the wheel, a detent normallv engaging said crank, said crank being also movable in a direction longitudin'al of said wheel axis both to become released from said detent and to engage said notches or openings, means mechanically maintaining such engagement during the rotation of the platen to and fro by said crank through an are greater than the movement nation with a revoluble platen and a platen frame, of a'wheel connected to the platen and havingopenings or notches at line-space intervals, a guard plate'upon the laten frame paralle with said wheel, a cran rev- 'oluble about said wheel axis and also swiveled to vibrate longitudinally of said wheel axis, a rejection upon said crank, a spring,

norma y pressing said projection into an opening in said g'uardplate, a tooth u on' said crank to engage said notched w eel when thecrank is Withdrawn from the opening in said guard plate, a stop forlimiting the throw of .the platen effected by said crank;'sa id guard plate efifective to main tain the engagement ofsaid crank with. said wheel during the excursion of the crank from and back to its starting point; and a stop to limit the throw of the crank and platen to less thana line space.

18. In a typewriting machine, the combination with a revoluble platen, an axle therefor, a finger wheel fixed thereto,,and a platen frame, of a wheel fixed to the finger wheel outside of the platen frame-and having openings or notches at line s ace inter vals, a guard plate being provide upon the platen frame parallel with said wheel, a crank between said late and wheel and swiveled to vibrate ongitudinally of the platen axis, a detent normally holding saidv crank, a spring normally pressing said crank away from said notched wheel, means u on said crank to engage said notched wl ieel when the lever is withdrawn from the detent, and a sto for limiting the throw of the platen efiecte by said crank; said guard plate e'fiective to maintain the engagement of said crank with said wheel'during the ex' cursion of the crank away from and back to its starting point.

19. In a typewriting machine, the combination with a revoluble platen, an axle therefor, and a'platen frame, of a wheel upon the platen axle and connected to the platen and having notches or openings at ine-space intervals, a manually operable member rotatable about the platen axle, a detent, as ring normally holding said manuallfy o era le member in engagement with said etent, said'rnanually operable member being movable along the platen axle to become disengaged from said detent and engaged with said wheel, to rotate the latter and the platen, means to maintain the engagement of the manually operable member with the toothed wheel, and stops to limit the throws of the platen from normal position efiected by said manually operable member, one of said stops set at less than a line-space and the other set at several linespaces from the normal position of the crank. r

WALTER E. BARNARD. Witnesses: 1

' W. BYoRKMAm,

MORTON O. TALCOTT. 

